Inconsistent output on a 4x4 matrix keypad

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  1. - 23rd November 2006, 08:23 #1
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    ASM GOTO need 2 cycle to execute, NOP only 1 cycle
    Steve

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  2. - 23rd November 2006, 08:29 #2
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    Ioannis
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    Yeap. You are right. Its a typical delay then...

    Ioannis
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  3. - 24th November 2006, 02:48 #3
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    I believe I found the problem. This circuit was designed for a 4Mz crystal and I am running it at 20Mz. I added a 'PAUSE 1" after the line 'TRISB = (DCD Row) ^ ff' to slow it down and this seems to of fixed the problem.

    Thanks for everbodys help,
    Mark
  4. - 24th November 2006, 03:54 #4
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    That's what @ GOTO $+2 did... but 2500 times faster

    also try with shorter PAUSEUS. PAUSEUS 5 should also work...
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.
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